1 ; RUN: opt -S -mtriple=amdgcn-- -amdgpu-replace-lds-use-with-pointer -amdgpu-enable-lds-replace-with-pointer=true < %s | FileCheck %s
5 ; There is one lds global defined here, and this lds is used within a single non-kernel
6 ; function, as an operand of nested constant expression, and this non-kernel function is
7 ; reachable from kernel. Hence nested constant expression should to be converted into a
8 ; series of instructons and pointer replacement should take place.
11 ; Original LDS should exist.
12 ; CHECK: @used_only_within_func = addrspace(3) global [4 x i32] undef, align 4
13 @used_only_within_func = addrspace(3) global [4 x i32] undef, align 4
15 ; Pointers should be created.
16 ; CHECK: @used_only_within_func.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2
18 ; Pointer replacement code should be added.
19 define void @f0(i32 %x) {
21 ; CHECK: %0 = load i16, i16 addrspace(3)* @used_only_within_func.ptr, align 2
22 ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0
23 ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)*
24 ; CHECK: %3 = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0
25 ; CHECK: %4 = addrspacecast i32 addrspace(3)* %3 to i32*
26 ; CHECK: %5 = ptrtoint i32* %4 to i64
27 ; CHECK: %6 = add i64 %5, %5
28 ; CHECK: %7 = inttoptr i64 %6 to i32*
29 ; CHECK: store i32 %x, i32* %7, align 4
32 store i32 %x, i32* inttoptr (i64 add (i64 ptrtoint (i32* addrspacecast (i32 addrspace(3)* bitcast ([4 x i32] addrspace(3)* @used_only_within_func to i32 addrspace(3)*) to i32*) to i64), i64 ptrtoint (i32* addrspacecast (i32 addrspace(3)* bitcast ([4 x i32] addrspace(3)* @used_only_within_func to i32 addrspace(3)*) to i32*) to i64)) to i32*), align 4
36 ; Pointer initialization code shoud be added
37 define amdgpu_kernel void @k0() {
39 ; CHECK: %0 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
40 ; CHECK: %1 = icmp eq i32 %0, 0
41 ; CHECK: br i1 %1, label %2, label %3
44 ; CHECK: store i16 ptrtoint ([4 x i32] addrspace(3)* @used_only_within_func to i16), i16 addrspace(3)* @used_only_within_func.ptr, align 2
48 ; CHECK: call void @llvm.amdgcn.wave.barrier()
49 ; CHECK: call void @f0(i32 0)